One of the accused had pleaded guilty, earlier this month, to his part in the crime.
Reporting of that case was deferred due to the fact two other accused had indicated they were pleading not guilty.
The pair were due to be put on trial yesterday.
However, both pleaded guilty to various charges. All three will be sentenced tomorrow.
Harry Clifton, aged 29, with an address at 11 St Finbarr’s Place, Proby’s Quay, Cork, was charged him with a total of nine counts originally.
Yesterday, he was arraigned on four counts and pleaded guilty to all four of them.
The drugs charges relate to January 19 of this year. He pleaded guilty at Cork Circuit Criminal Court to having the drug colloquially known as N-bomb for the purpose of supply.
Clifton also admitted having MDM for supply.
He admitted simple possession of two other drugs, namely cannabis and DMT.
Ruairí Maher, aged 22, of 12 Ballycurrane, Thurles, Co Tipperary, and Jessica O’Connor, aged 20, of Rosebank House, Ballyhar, Killarney, Co Kerry, both admitted conspiring with another to possess a controlled drug for the purpose of sale or supply to another in Cork City on January 18 and that the drug was colloquially known as N-bomb.
Alex Ryan, aged 18, from Liscahane, Millstreet, Co Cork, died on January 23.
Cork Coroner’s Court previously heard the teenager died after consuming the synthetic drug known as N-bomb.
Mr Ryan had been on a life support machine at Cork University Hospital after becoming ill at the house party at St Patrick’s Terrace on Green St in Greenmount, Cork City.
There is no reference to the late Mr Ryan in any of the charges.
Pearse Sreenan prosecuting, confirmed the case would be ready to go to sentencing tomorrow.
Mr Sreenan also indicated they would also be ready for sentencing.
Judge Seán Ó Donnabháin remanded Clifton and O’Connor on continuing bail yesterday.
Maher’s had been previously adjourned following an earlier plea of guilty.